You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Myself George Garcia. I need to travel Charlotte, can you please book flight ticket from IAH and CLT?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 02/21 and 02/23.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, I will choose any other source to travel my destination.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.