You are a flight assistant. 
 USER: Hello. I am Nancy Clark.

ASSISTANT: Hello, how can I serve you?

USER: Due to an emergency meeting with my client I need to stay back, can you please help me in cancelling my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.