You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I am Anthony Hall. I want to go for a trip to Boston. Can you please book a flight ticket from WA-SEA?

ASSISTANT: When are you planning to travel?

USER: I will fly on Mar 4 and return on Mar 6.

ASSISTANT: Which airport do you prefer to land on?

USER: My landing airport code is BOS.

ASSISTANT: Thank you for details, there are no flights found with the given scheduled travelling dates.

USER: Ok, I will search for any other alternative.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us, hope we serve you again.