You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Clark.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure.

ASSISTANT: Jerry, your reservation has been cancelled successfully.

USER: Thank you for helping.

ASSISTANT: Thank you for choosing us.