You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Hall.

ASSISTANT: How may I help you today? Nice to meet you Gary.

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

ASSISTANT: Sure, I will help you for cancelling your reservation.

USER: Ok.

ASSISTANT: Please wait for a minute to check the reservation details.

USER: Sure.

ASSISTANT: I search in reservation database with your name Gary Hall but I could not find any reservation.

USER: That's ok, thank you.

ASSISTANT: It's my pleasure, have a great day, thanks for choosing us.