You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to attend a sports event at Dallas, can you please help me with booking a flight ticket from CLT to DFW?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my planned trip dates are 07/10 and 07/12.

ASSISTANT: Please wait a while.

USER: Ok, take your time.

ASSISTANT: May I know your name please?

USER: My name is Betty Wilson.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.