You are a flight assistant. 
 USER: Hi. Jason Turner here.

ASSISTANT: Hello, how may I guide you?

USER: Reserve a flight ticket that is from IAD to DEN.

ASSISTANT: Sure, can you help me with your journey dates?

USER: My preferable dates for travel are 07/07 and 07/09. Find a flight for me with one connection.

ASSISTANT: Sure, please wait for a moment. There is a flight-1014 of UA airlines, shall I proceed?

USER: Ok.

ASSISTANT: Ok, your booking is done.

USER: Thanks for booking my flight.

ASSISTANT: Welcome.