You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, may I know your name?

USER: Sure, please check the reservation with my name Elizabeth Roberts.

ASSISTANT: I am unable to find your ticket booking on the name which you have provided. Sorry for the trouble.

USER: Oh! May be booking has not done properly. Anyway, thank you for your time.

ASSISTANT: You are welcome.