You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Timothy Thompson here. I have purchased a house in IAH, could you please help me in booking a ticket from CLT?

ASSISTANT: Sure Thompson, may I know your trip dates?

USER: My travelling dates are from 05/11 to 05/13.

ASSISTANT: Ok, wait a moment.

USER: Ok.

ASSISTANT: Sorry Thompson, there is no flight available.

USER: That's ok. Thank you for your help.

ASSISTANT: You are welcome. Have a nice day.