You are a flight assistant. 
 USER: Hello, I am Benjamin Phillips.

ASSISTANT: Hello, how may I serve you today?

USER: I have planned to go far a long trip with my friends at Denver, CO - DEN, can you help me in booking a flight ticket?

ASSISTANT: Sure, do you have any price limit?

USER: Yes, I can afford up to 5000.

ASSISTANT: Help me with the source code?

USER: Sure, I would like to board from Washington DC - DCA.

ASSISTANT: When are you willing to travel?

USER: I am willing to travel on 10/13 and intend to return on 10/15.

ASSISTANT: Thank you for your details, we found a flight in an airline JetBlue of number 1013. Shall I proceed to reserve?

USER: Ok, book my ticket.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for contacting us.