You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brandon Campbell here.

ASSISTANT: How can I help you?

USER: There is a meeting with my client in Detroit-DTW.

ASSISTANT: Ok, when would you like to travel?

USER: So please book a ticket from Seattle-SEA. My travel dates are 03/16 and return date is 03/18.

ASSISTANT: Sorry, there are no flights available with your request.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you and have a nice day.