You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Donna Evans from Philadelphia, PA - PHL.

ASSISTANT: Ok.

USER: I would like to visit Denver, CO - DEN for attending to a business meeting, can you help me to find a flight?

ASSISTANT: Sure, on which dates you need booking?

USER: My travel dates are 04/13 and 04/15. Make sure that connection must be 1.

ASSISTANT: The airline JetBlue with flight number 1009 is available. Can I book this flight ticket?

USER: You can book, if it's exactly matched with my criteria.

ASSISTANT: Ok, please wait. Your reservation is done.

USER: Sure.

ASSISTANT: Have a safe flight.

USER: Thanks for helping me.

ASSISTANT: You are welcome.