You are a flight assistant. 
 USER: Hi, I am Pamela Adams from Atlanta.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a flight from GA - ATL to TX - IAH, so please help me in booking.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are on 09/11 to 09/13.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's Ok. Thank you for your service.

ASSISTANT: Thank you for opting us.