You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Adams here.

ASSISTANT: How can I assist you at this moment?

USER: I would like to visit Boston for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I am happy to help you with flight ticket booking.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: I am planning to leave on 02/03 and please book my return ticket on 02/05.

ASSISTANT: Ok Samuel Adams, please let me know airport codes of your journey locations.

USER: Sure, I will prefer DEN and BOS as my origin and destination airport codes respectively because those airport codes are near and convenient for me to travel.

ASSISTANT: Ok Samuel Adams, please be on hold for a moment to check flight availability in your route.

USER: Sure, take your time but try to bring a best flight in my route.

ASSISTANT: Thank you for waiting.

USER: It's alright.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates due to some weather conditions.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome.