You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Melissa Williams. Please book me a ticket from MCO to SEA to meet my family.

ASSISTANT: Sure, please share me your trip dates.

USER: I have planned to travel on 02/17 and 02/19.

ASSISTANT: Do you need any preferences?

USER: I prefer evening flight.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.