You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Davis here.

ASSISTANT: How can I  help you?

USER: I would like to spend my free time at Atlanta, please help me in booking a ticket from IAH to ATL.

ASSISTANT: Your travelling dates please?

USER: Ok, my planned trip dates are from 01/09 to 01/11.

ASSISTANT: I am sorry  no flights found on your route.

USER: It's ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.