You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Kathleen Roberts.

ASSISTANT: Good Evening, Kathleen.

USER: I am a student, I have to visit Space Center in Houston for my project work can you please book a flight ticket from CLT to IAH?

ASSISTANT: Sure, may I know your journey dates please?

USER: My traveling dates are 09/14 and 09/16.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry for inconvenience, there is no flight available at your requested dates.

USER: It's ok. Thank you for your information.

ASSISTANT: Thank you for contacting us, Kathleen.