You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to change my reservation as I am not able make my trip right now. Can you help me with that?

ASSISTANT: I am willing to help you, may I know your name to check your reservation status?

USER: Sure, my name is Samantha Phillips.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is no reservation found on your name to change it.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thanks for choosing us.