You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Wilson.

ASSISTANT: How may I render you today?

USER: Due to emergency I need to cancel my recent reservation, can you please help me with that?

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

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

USER: Sure.

ASSISTANT: Thank you for waiting, we did not found any reservation on this name.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.