You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER:  I am Thomas Martinez from Detroit. I want to go to Los Angeles next week. Can you please book a flight ticket for me?

ASSISTANT: Sure Thomas Martinez, I will help you with that. Can I have your travel dates please?

USER: Thank you for your positive response, I want to take off on 01/19 and please confirm my return ticket also on 01/21.

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

USER: I want to fly from DTW and destination airport is LAX.

ASSISTANT: Ok Thomas Martinez, please wait a moment to check flight availability.

USER: Ok, take your time and find a best flight for me.

ASSISTANT: Sorry Thomas Martinez, no flight is available to you on your dates due to some weather conditions.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a great journey.