You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you tell me your name?

USER: I'm Elizabeth Davis.

ASSISTANT: OK. How may I help you Elizabeth?

USER: Can you help me in booking a flight ticket?

ASSISTANT: Yes sure. Please tell me from which airport you want to book a flight.

USER: My source is New York and the destination is Denver.

ASSISTANT: Can you tell me airport code respectively?

USER: The codes are JFK and DEN.

ASSISTANT: What's your preferred dates for travel?

USER: I want to travel from 09/21 to 09/23.

ASSISTANT: OK. I have a single flight ticket for this flight. Price is 100 with 1 connection. Would you want to book this flight ticket?

USER: It's perfect, please book the flight.

ASSISTANT: sure. Your flight ticket is booked. Thank to join us.Have a safe journey.

USER: Thank you for helping me out.