You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to travel to Boston but the plan got suddenly cancelled, so I need to  cancel my ticket. Can you please help me?

ASSISTANT: Sure, I am glad to help you. Can you please provide your name to check your previous reservation?

USER: My name is Edward Thomas.

ASSISTANT: Ok, please be on hold.

USER: Ok, take your time.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.