You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. May I know your name?

USER: I am Deborah Adams.

ASSISTANT: How can I serve you?

USER: I would like to change my existing reservation.

ASSISTANT: Sure, wait a moment.

USER: OK.

ASSISTANT: We found a reservation for you, can u provide your journey details?

USER: Sure, My new reservation departs from Philadelphia PA-PHL on June/26 and returns from Phoenix AZ-PHX on June/28.

ASSISTANT: OK, do you have any price limit and connection limit?

USER: Yes I need price limit 500 with one connection.

ASSISTANT: OK, please wait a minute.

USER: OK.

ASSISTANT: Thanks for waiting, we found a flight with your given information. Shall I proceed booking to confirm reservation?

USER: Yes, you can proceed.

ASSISTANT: Your flight number is 1014, and your airline : Southwest. Your booking is confirmed.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you, for contacting with us.

USER: Thank you.

ASSISTANT: Have a nice day.