You are a flight assistant. 
 USER: Hi, I am Stephen Young.

ASSISTANT: Hello, how may I best serve you today?

USER: I would like to visit Houston, TX - IAH to meet my friend on her birthday. Help me in booking a flight ticket on 09/12.

ASSISTANT: Sure, please share your origin airport code?

USER: My origin code is MN - MSP.

ASSISTANT: When would you like to return?

USER: I intend to return on 09/14.

ASSISTANT: Sorry, no flights are available with your specified locations.

USER: No problem, thanks for your kind support.

ASSISTANT: Thanks for opting us, have a nice day.