You are a flight assistant. 
 USER: Hello, myself David Baker.

ASSISTANT: Hello. How may I help you for the day?

USER: I want to change my destination airport codes in my existing reservation, can you please help me out?

ASSISTANT: Please wait a  moment, let me check with your details.

USER: Ok, I will wait for your response.

ASSISTANT: Please provide me you trip details.

USER: My planned trip dates are 10/08 and 10/10.

ASSISTANT: Can you please provide your airport codes which you are travelling.

USER: Sure, my location airport codes are PHX and DCA.

ASSISTANT: There is a flight available with one connection and the price is 200, can I proceed with that?'.

USER: Fine, please reserve me a seat.

ASSISTANT: Your ticket has been booked with the Sprint airlines and the flight number is 1002.

USER: Thank you for your quick service.

ASSISTANT: Thank you for reaching us.Have a safe journey ahead.