You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Lee.

ASSISTANT: How may I help you?

USER: I have a concert to attend at New York. Can you find any flights available to New York?

ASSISTANT: May I know your airport codes please?

USER: My journey starts from DCA to LGA.

ASSISTANT: Can you please share your journey dates?

USER: Please find the availability on dates 06/04 and 06/06.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in Spirit airlines with price 400. Can I proceed?

USER: Ok, please book the ticket.

ASSISTANT: Ok, your ticket has been confirmed with flight number 1028.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.