You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me to book a ticket from DCA to SEA?

ASSISTANT: Sure, May I know your travelling dates?

USER: My depart date is on Oct 16 and return date is on Oct  18.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Mark Brown.

ASSISTANT: You have a connecting flight 1010 in Spirit airlines and price 100, Shall I proceed?

USER: You can proceed.

ASSISTANT: Your reservation is done.

USER: Thank you.

ASSISTANT: Thank you.