Όπως κι αν κάνω την αλλαγή εισιτηρίου, κρατάω τον αριθμό κράτησης.

Όπως κι αν is a fixed pattern meaning however, no matter how, or in whatever way.

In this sentence, it introduces the idea that the result stays the same regardless of the method used. So it sets up a contrast like:

• however I make the ticket change
• no matter how I change the ticket

The key idea is manner: it is about how something is done.

Because όπως refers to the way/manner in which something is done, while ό,τι refers to the thing/whatever.

So:

• όπως κι αν κάνω... = however I do... / no matter how I do...
• ό,τι κι αν κάνω... = whatever I do...

In your sentence, the speaker is talking about the way of making the ticket change, so όπως is the correct choice.

κι is a shorter form of και. In many everyday expressions, especially before a vowel, Greek often uses κι instead of και.

Here it is part of the common pattern:

• όπως κι αν
• ό,τι κι αν
• όπου κι αν

In this structure, κι αν helps create the sense of no matter... / however.... It does not mean and in a simple literal way here; it is part of the whole expression.

Yes, this kind of clause has a subjunctive-like meaning, even though the form κάνω looks the same as the present indicative.

A helpful point for learners is this:

• κάνω can mean I do / I make
• but in some structures it can also function where English would use something like however I may do it

After expressions such as όπως κι αν, Greek uses a verb form that expresses uncertainty, possibility, or non-specific situations. In the present tense, many verbs have the same form for indicative and subjunctive, so you just see κάνω.

So here, κάνω is not simply a plain statement I do. It is part of the pattern however I do / however I might do.

Because in this structure, να is not used.

Greek learners often associate the subjunctive with να, but not every clause with subjunctive meaning needs να. In patterns like:

• όπως κι αν
• ό,τι κι αν
• όπου κι αν

the combination with αν already creates that kind of meaning, so να is not added.

So Όπως κι αν κάνω... is correct, while adding να here would sound wrong.

Literally, την αλλαγή εισιτηρίου is something like the change of ticket or the ticket change.

Here:

• η αλλαγή = the change
• το εισιτήριο = the ticket
• του εισιτηρίου = of the ticket

In the sentence, εισιτηρίου is the genitive singular form, meaning of ticket / of the ticket.

Greek often uses the genitive where English uses a noun-noun combination:

• αλλαγή εισιτηρίου = ticket change
• literally: change of ticket

So εισιτηρίου is in the genitive because it depends on αλλαγή.

Greek often uses a very common verb like κάνω together with a noun, where English might also use a noun phrase or might prefer a single verb depending on context.

So:

• κάνω την αλλαγή = make/do the change

This is very natural Greek. Similar patterns are common:

• κάνω κράτηση = make a reservation
• κάνω ερώτηση = ask a question
• κάνω προσπάθεια = make an effort

So κάνω την αλλαγή εισιτηρίου is a normal way to say make the ticket change.

Here κρατάω means I keep, I retain, or I hold on to.

So in this sentence it means that the speaker keeps the reservation number unchanged.

Yes, κρατάω and κρατώ are forms of the same verb. In Modern Greek, both are used:

• κρατάω is very common in everyday language
• κρατώ is also correct and can sound a bit more formal or concise

So:

• κρατάω τον αριθμό κράτησης
• κρατώ τον αριθμό κράτησης

Both are possible.

For the same reason as εισιτηρίου earlier: Greek uses the genitive to show a relationship like of.

Here:

• ο αριθμός = the number
• η κράτηση = the reservation / booking
• της κράτησης = of the reservation

So:

• τον αριθμό κράτησης = the reservation number
• literally: the number of reservation / of the booking

Again, English often uses one noun before another, but Greek commonly expresses this with the genitive.

Greek uses the definite article more often than English does.

In this sentence:

• την αλλαγή εισιτηρίου
• τον αριθμό κράτησης

the speaker is referring to specific things that are understood from the situation:

• the particular ticket change being discussed
• the particular reservation number connected to that booking

Greek often sounds more natural with the article in such cases, even where English might say something more general like when changing a ticket or I keep my reservation number.

So the articles are not unusual here at all.

Yes. Greek word order is more flexible than English word order.

The sentence starts with Όπως κι αν κάνω την αλλαγή εισιτηρίου because that part is being foregrounded first: however I make the ticket change...

You could also say:

• Κρατάω τον αριθμό κράτησης, όπως κι αν κάνω την αλλαγή εισιτηρίου.

That keeps the same basic meaning, but the emphasis changes a little. The original version feels natural because it presents the condition first and then gives the main result.

The comma is used because the first part is a subordinate clause.

Yes:

• Όπως κι αν = however / no matter how
• κάνω = I do / I make
• την αλλαγή εισιτηρίου = the ticket change
• κρατάω = I keep / retain
• τον αριθμό κράτησης = the reservation number

A fairly literal structure would be:

However I make the ticket change, I keep the reservation number.

That literal view can help you see how the Greek grammar is built, even if the natural English translation might be phrased a little differently.