You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have made a reservation earlier to meet my friends but it got postponed as of now, can you help me with changing my reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is James Campbell.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time, we couldn't find any active reservation in your name.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for reaching us.