You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Brian Thompson. I would like to book a ticket to New York, can you please help me out?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I am travelling on these dates 11/03 and 11/05.

ASSISTANT: May I know your airport codes too?

USER: I am flying from SEA to JFK.

ASSISTANT: Ok, please hold on for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights found.

USER: Ok no problem, thank you for your valuable services.

ASSISTANT: Thank you for reaching us.