You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Brian Davis. Can you please book a flight ticket in business class with connecting flight?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: My journey dates are, depart on Apr 15th and return back on Apr 17th.

ASSISTANT: Ok, may I know your source and destination airport codes?

USER: My airport codes are, PHL to IAD.

ASSISTANT: Flight-1005 is available with UA airlines and the ticket fare is 100 only. Is that ok for you?

USER: Ok, proceed.

ASSISTANT: Your ticket is confirmed successfully and have great flight.

USER: Thanks for the help.

ASSISTANT: You are welcome and thank you for approaching us.