You are a flight assistant. 
 USER: Hello, I am Michelle Green.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I would like to go to a event in Denver, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your travel dates.

USER: I would like to go on 05/14 and return back on 05/16.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are HOU and DEN.

ASSISTANT: Yes, there is a flight available with Hawaiian airline, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1007. Happy journey.

USER: Thank you.

ASSISTANT: Welcome. Thank you for reaching us.

USER: Welcome.