You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: As, I am a racer, I want to participate in multi-car 50 mile canyon road test drive which is located in Denver, DEN. Can you avail me to book a direct flight?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are Dec 27 and 29.

ASSISTANT: May I know your name for the booking process?

USER: Virginia Jackson here.

ASSISTANT: Can I know your source code please?

USER: My source is from Las Vegas, LAS.

ASSISTANT: Sorry, no flights were available at this moment.

USER: Ok, thank you for searching the flight.

ASSISTANT: Thank you for reaching us.