You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How shall I serve you now?

USER: Could you please book a plane ticket on 09/07 as I have a football match in my college at Houston?

ASSISTANT: Ok. May I have your name please?

USER: My name is Alexander Jackson.

ASSISTANT: Let me know your other journey details.

USER: I want to return on 09/09. The airport codes are DFW-HOU.

ASSISTANT: Thanks for waiting. We found that there was no flight that matches with your data.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.