You are a flight assistant. 
 USER: Hello,. I am Ruth Harris.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for a flight from IAD to SEA, can you help me in booking the flight ticket?

ASSISTANT: Sure. Please share your travelling dates.

USER: My trip dates are from 05/08 till 05/10.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Welcome. Thank you for reaching us.