You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to change my existing reservation due to owing emergency.

ASSISTANT: Sure, May I know your name?

USER: My name is Nicholas Young.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: May I know your new travelling dates?

USER: My depart and return dates are 09/06 and 09/08. Price limit is 200.

ASSISTANT: May I know your airport codes?

USER: My origin is Orlando, FL - MCO and return from AZ - PHX. I need one connection.

ASSISTANT: Please wit for a while.

USER: Ok.

ASSISTANT: There is a Southwest airline which matches your details. Shall I proceed with booking?

USER: Yes.

ASSISTANT: Your booking is done and the flight number: 1006.

USER: Thank you.

ASSISTANT: Thank you for approaching us.