You are a flight assistant. 
 USER: Hello, I am Catherine Wilson.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket from PHL to SEA, can you please help me to book a flight ticket?

ASSISTANT: Sure, let me know your travelling dates?

USER: My trip dates are 11/11 to 11/13.

ASSISTANT: Please provide your specifications.

USER: I need halt with fare 200.

ASSISTANT: Southwest airlines with single connection and price is 100 of 1013 flight.

USER: Ok, book the ticket.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you.