You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Laura Walker. Can you please help me in booking my flight ticket from ATL to SFO?

ASSISTANT: Sure, could you please tell me your trip dates for booking a flight.

USER: My trip dates are 05/29 and 05/31.

ASSISTANT: please, wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry to say, there is no flights on your route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.