You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help?

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

ASSISTANT: Sure, just a moment please.

USER: Thank you.

ASSISTANT: On which name can I find the reservation?

USER: Please check the reservation with my name Rebecca Wilson.

ASSISTANT: I am sorry no reservation found on tour name.

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

ASSISTANT: Thanks for choosing us.

USER: Anyway, thank you for your time.