You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, provide your name please.

USER: I am Jessica Turner.

ASSISTANT: Please wait for a couple of minutes, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: My pleasure.

ASSISTANT: No reservation was found on your name in our database.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.