You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need to change my reservation due to my planned event got postponed so please help me with that.

ASSISTANT: Sure, may I know your name?

USER: Sure, please check the reservation with my name Amanda Thompson.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! May be booking has not done properly.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for your time.