You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me book a flight ticket on the name of Katherine Campbell from Charlotte to attend a comic con at Houston?

ASSISTANT: Sure, I will help you in booking. Can you please let me know your preferable travelling dates so that I can check the availability of flights?

USER: I need to depart on 12/07 and return on 12/09.

ASSISTANT: Kindly let me know your price preference.

USER: I can afford up-to 500.

ASSISTANT: Do need any stop over in between your journey?

USER: Yes, I prefer a connecting flight in my journey.

ASSISTANT: sure, please let me know your airport codes.

USER: I would like to reach IAH from CLT.

ASSISTANT: Thanks for providing information, please wait a moment I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for your time, we are unable to provide flight for you as there is a terminal up gradation  going on at your destination airport.

USER: Ok, thank you for the information.

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