You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I planned a trip to Houston last week, but because of financial issues I want to postpone the trip, can you help me in changing the reservation?

ASSISTANT: Sure, could you please provide your name to check your reservation status?

USER: I reserved the ticket on the name Linda Davis.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: That's ok, thank you for your information,.

ASSISTANT: Thank you for choosing us, have a nice day.