You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Gary Walker.

ASSISTANT: How can I help you?

USER: Can you please book a flight ticket in the afternoon to DEN?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My journey dates are, depart on Mar 23rd and arrival on 25th.

ASSISTANT: Ok, can I know your source airport code?

USER: My source airport code is IAD.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: If departure time is afternoon, proceed with the booking.

ASSISTANT: Your ticket is booked with Jet Blue airlines.

USER: May I know the flight number?

ASSISTANT: Flight number is 1001.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.