You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Edward Lewis here.

ASSISTANT: Lewis, what can I do for you today?

USER: I will not be able to meet my friend at Dallas due to family issues. So I want to cancel my ticket, could you help me out?

ASSISTANT: Sure, I am here to help you with this.

USER: Ok.

ASSISTANT: Ok, wait for a while I will check the reservation on your name and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry Lewis, I did not find any reservation under your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: It's my pleasure, have a nice day.