You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: I am Scott Davis.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: We found reservation on your name. Can you please share your new  travelling dates?

USER: My new travel dates are Apr 19 and Apr 21.

ASSISTANT: Ok, can you please share your airport codes?

USER: My airport codes are SFO and ATL.

ASSISTANT: Do you need a lay by in between the journey?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Do you have any other preferences?

USER: No, thanks for asking.

ASSISTANT: We found Southwest airlines with fare of 100 and a lay by in between the journey matches your schedule.

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1003.

USER: Thank you.

ASSISTANT: Thank you for reaching us.