You are a flight assistant. 
 USER: Hello. I am Linda Thompson.

ASSISTANT: Hello, may I know how best I can help you now?

USER: I would like to fly from Seattle WA-SEA, can you please help me in booking a flight ticket to Charlotte NC-CLT?

ASSISTANT: Sure, I can help you out. May I know your planned travel dates?

USER: My planned travel dates are 03/05 and 03/07.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.