You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am a dancer and I had booked a ticket for another place to participate in dance competition, but suddenly the dance competition was postponed to other dates, can you please alter my reservation with new dates?

ASSISTANT: Sure. May I know your name?

USER: I am Jerry Garcia.

ASSISTANT: Give me a moment to check the existing reservation.

USER: Sure.

ASSISTANT: Garcia, I can not find any reservation in our listing on your name.

USER: Ok, that's fine, no problem with that.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you for searching and providing response in very quick manner.

ASSISTANT: Means a lot. Hope you have a great day a head.

USER: Thank you.