You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Nicole Edwards.

ASSISTANT: How may I assist you/.

USER: I am planning to attend convocation meeting at Houston, can you please help me with booking a flight ticket?

ASSISTANT: Ok, let me know your locations?

USER: My source airport code is IAD and the destination airport code is HOU.

ASSISTANT: Ok, may I know your trip dates to go?

USER: Sure, I would like to take off on 12/12 and return back on 12/14.

ASSISTANT: Sorry for the inconvenience, there is no flight for you on your preferable dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Ok, thanks for choosing us.