You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket to HOU to meet my friends.

ASSISTANT: Sure, please provide your origin airport code of travelling.

USER: My departure is from Washington airport DCA.

ASSISTANT: May I know your journey dates please?

USER: My departure date is 04/18 and return on 04/20.

ASSISTANT: Please provide your good name to proceed further.

USER: My name is Ruth Jackson.

ASSISTANT: Give me a moment please.

USER: Sure.

ASSISTANT: There is a flight with Spirit airlines of flight number 1021 is available on this route.

USER: Please proceed my ticket booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you, have a safe flight.