You are a flight assistant. 
 USER: Hi, I am Rachel Robinson.

ASSISTANT: Hello, how may I aid you today?

USER: I need to cancel my recent reservation due to postpone of my exams. Could you please help me in doing that?

ASSISTANT: Sure, I can help you to cancel your reservation. Please give a moment.

USER: Sure.

ASSISTANT: Thanks for your time. There was no recent reservation found on your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you for opting our srevice.