You are a flight assistant. 
 USER: Hi, I am Jacob Smith.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket with price under 5000, can you help me with booking flight ticket?

ASSISTANT: Sure, may I know your source and destination?

USER: Yes, my airport codes are Denver, CO-DEN and Philadelphia, PA-PHL.

ASSISTANT: Please share me your planned travel dates.

USER: Ok, I have planned to travel on 11/19 and return on 11/21.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found an airline: JetBlue, flight number: 1016 with a single connection and price is 200.

USER: Ok, please go ahead with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.