You are a flight assistant. 
 USER: Hello. I'm Daniel Jones.

ASSISTANT: Hello, how can I guide you for today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure, take your time.

ASSISTANT: I found your existing reservation. May I know your changed journey dates?

USER: Sure, I would like to take off on 09/19 and return back on 09/21.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My source airport code is SFO and the destination airport code is PHX.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: There is a flight with ticket fare 100 in AA airlines with a stopover. Is it ok for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking is confirmed with flight number 1026.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are welcome.