You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Charles Allen here. I would like to reserve my ticket from SEA to LGA. Can you please help me in booking?

ASSISTANT: Your travelling dates please?

USER: My planned travel dates are Sept 18 and Sept 20.

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

USER: Not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.