You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My trip was postponed so can you please change my travel dates in my previous reservation?

ASSISTANT: Sure, can I have your name please?

USER: Thank you, my name is Debra Gonzalez.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.