You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Timothy Rodriguez here. Can you please help me in booking a flight ticket from IAD to LGA?

ASSISTANT: Your travelling dates please?

USER: Sure, my travelling dates are from 01/14 to 01/16.

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

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.