You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica Walker.

ASSISTANT: How may I help you today?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, just a moment I will check the reservation status.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: That's ok, thank you.

ASSISTANT: Thanks for opting us.