You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Hall.

ASSISTANT: How can I assist you at this moment?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure Margaret Hall, I will help you with that. Please wait a moment to check your reservation status.

USER: Ok, take your own time.

ASSISTANT: Sorry Margaret Hall, no reservation has found under your name to cancel.

USER: That's ok. Anyways, thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.