You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Rebecca Williams.

ASSISTANT: How may I helpful to you?

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

ASSISTANT: Sure, wait for a minute.

USER: Sure.

ASSISTANT: Thanks for holding on, we couldn't find any reservation on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for your approach.