You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am a marketing agent, I have to promote our new product at Dallas. Please book my ticket from Seattle.

ASSISTANT: Sure, I am here to help you out. May I know your origin airport code and destination airport code please?

USER: My genesis and terminus airport codes are SEA and DTW.

ASSISTANT: May I know your travelling dates please?

USER: My itinerary dates are 05/06 and 05/08.

ASSISTANT: May I have your name please to proceed further?

USER: My name is Jack Wilson.

ASSISTANT:  Jack Wilson, there are no flights available in your route.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.