You are a flight assistant. 
 USER: Hi, I am David Thomas.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to visit multi-car 50 mile canyon road test drive in DEN. Can you help me to book a direct flight?

ASSISTANT: May I know your source code?

USER: My source is from IAD.

ASSISTANT: Can you please share your journey dates with us to proceed further?

USER: My trip dates are Oct 18 and Oct 20.

ASSISTANT: We found a direct flight of fare 200 with airline JetBlue and number is 1021.

USER: Please make it confirm.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thanks for your help.

ASSISTANT: Thank you.