You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Davis.

ASSISTANT: How may I help you today?

USER: I need some urgent help in my flight ticket cancellation that I have done in the last week that I am unable to travel the trip on those dates, can you please help me in cancel the flight ticket?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry for the trouble, there is no reservation found on your name in our database.

USER: It's alright, no problem with that one. Thank your for providing the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.