You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Robinson.

ASSISTANT: How may I help you?

USER: I am a singer and would like to participate in the live concert in Phoenix, but due to some health issues I could not attend the live concert.So I would like to cancel my recent reservation. Could you please avail me in cancellation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Reservation found. Your reservation is cancelled.

USER: Ok, thank you for your information.

ASSISTANT: Thanks. Have a nice day!.