You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to a sudden meeting at office with my client on my boarding day, I want to cancel my recent reservation. Can you help me with that?

ASSISTANT: Sure, we are here to help you. To proceed further, May I know your name?

USER: Sure, my reservation has been done on the name of Helen Allen.

ASSISTANT: Ok, please standby, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for being patient, we did not find any reservation on your name.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for reaching us.