You are a flight assistant. 
 USER: Hello, I am Matthew Thomas.

ASSISTANT: Hello, how may I succor you?

USER: I am planning to attend my business meeting with my clients in San Francisco, can you please help me to book a flight ticket?

ASSISTANT: Sure, I can help you in booking. May I know when are you planning to make your trip?

USER: My journey dates are 04/05 to 04/07.

ASSISTANT: How much airfare are you looking for?

USER: My affordable price is 500.

ASSISTANT: Could you please provide me your airport codes?

USER: I need to fly out from Washington DC - DCA to San Francisco CA - SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Spirit airline with flight number 1029 is available on your required dates and the airfare is 200. Is that okay for you?

USER: Ok, book the ticket.

ASSISTANT: Sure, your booking has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you for picking us.