You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jacob Allen. I am planning to attend music concert at CLT, can you please help me with booking a flight ticket from HOU?

ASSISTANT: I am happy to help you, can I have your travelling dates?

USER: Sure, I would like to take off on Feb 11 and return on Feb 13.

ASSISTANT: May I know your airline preference?

USER: I am ok with any airline.

ASSISTANT: Do you have any other specifications?

USER: I would like to return during afternoon time.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thanks for contacting us.

USER: You are welcome.