You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help you are expecting from us?

USER: I am Charles Lee from Detroit. I have planned a trip with my friends in Phoenix as I have got some leaser time to spend a time with my friends after a long time. So please help me with flight ticket booking from Detroit.

ASSISTANT: Sure, I am happy to help you in the flight ticket booking. May I know your airfield locations?

USER: Thank you for accepting my request. I would like to travel from DTW to PHX as these are very much near to travelling locations.

ASSISTANT: Thank you for providing your airport details. Could you send me your preferable journey dates?

USER: Sure, I have planned my travel dates as 03/28 and 03/30 as these are the only dates I have got as leaves.

ASSISTANT: Ok Lee, please wait for a moment, so that I will search a best flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: We are regret to say that, there are no flight's available based on your travelling details due to weather conditions.

USER: Oh! It is sad to hear. I have to choose another agency this time to reach there. Anyway, thank you for your valuable time.

ASSISTANT: Thank you for choosing us. Have a nice day.

USER: Most welcome.