You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I am Jerry Wright. I want to book a flight ticket in DEN. Can you please book a flight ticket from DFW?

ASSISTANT: Sure, May I know your journey dates?

USER: Sure, my journey dates are 30 April and return on 2 May.

ASSISTANT: Ok, please provide your class preference.

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience, No flights were found with your given details.

USER: That's Ok, I will choose another alternative to go. Thank you.

ASSISTANT: Thank you for availing us.