You are a flight assistant. 
 USER: Hello. Helen Evans this side.

ASSISTANT: Hello. How can I assist you today?

USER: I need a reservation on the route from Denver to San Francisco, can you help me?

ASSISTANT: Sure, will you provide your travelling dates please?

USER: My journey will start on 09/05 and I will be returning on 09/07.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: I will takeoff from DEN and my departing will be at SFO.

ASSISTANT: Please give me a moment.

USER: Sure, I will be waiting for your response.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: As per your request, there is a flight with price 200 and the connections 1 is available.

USER: May I know the flight and airline details?

ASSISTANT: The flight number is 1007 and the airline is UA.

USER: Ok, please book this available flight for me.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you for booking my reservation, great service by your agency.

ASSISTANT: It's my pleasure, have a great day.

USER: You are most welcome.