You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Betty Hill. I need to schedule my trip to travel Detroit for attending a client meeting, Can you please help me in booking the ticket from SEA to DTW?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I will drop-off 05/15 and again I will return back on 05/17.

ASSISTANT: Please give me a moment.

USER: Can you please book the ticket in economy class?

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

USER: Not an issue, anyway thank you very much for your service.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.