You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is John Thomas. Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Please wait for a moment, I will revert you back with your status of reservation.

USER: Ok.

ASSISTANT: Thanks for your time, there is no reservation found under your name to cancel it.

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

ASSISTANT: Ok, thanks for contacting us.

USER: Welcome.