You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Christopher Thompson.

ASSISTANT: Wait a while, kindly.

USER: Ok, take your time.

ASSISTANT: Thank you for being waiting, we did not find any active reservation in your name to make changes further.

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

ASSISTANT: Thank you for reaching us.