You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have reserved a flight ticket for me to reach Detroit but the trip got postponed, can you change my ticket?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Sure, my name is Nicole Garcia.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no reservation found. Thank you for reaching us.

USER: Ok, thank you for your search and information.