You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I  aid you?

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

ASSISTANT: May I know your name?

USER: Thank you. Please check the reservation with my name Jason Robinson.

ASSISTANT: Sorry, no reservation found on your name.

USER: Oh! It may not be booked  properly. Anyway, thank you for your time.

ASSISTANT: Thank you.

USER: Most welcome.