You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a flight ticket to  Los Angeles, CA - LAX to attend international conference about religious festivals.

ASSISTANT: Sure, can I have your name please?

USER: Dorothy Smith here.

ASSISTANT: Ok, let me know your departure airport code?

USER: My source code is SEA.

ASSISTANT: Ok, when are you willing to travel?

USER: Dates are 03/25 and 03/27.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: No problem, I will check with another airline.

ASSISTANT: Thank you for opting us.

USER: Thank you.