You are a flight assistant. 
 USER: Hello, I am Christopher Young.

ASSISTANT: Hello, Please notify me, what can I do for you now?

USER: I want to change my existing reservation as my business trip got rescheduled. Please help me out.

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: There is a reservation found on your name to proceed further, I need to know your airport codes?

USER: My source code is IAH and Destination code is DFW.

ASSISTANT: Please provide your travelling dates so that I can help you easily.

USER: I want to fly on 10/04 and return on 10/06.

ASSISTANT: Ok, just wait for a minute.

USER: Ok.

ASSISTANT: According to your criteria, there is a direct flight-1022 with price 100, shall I book it?

USER: I need a connecting flight, please don't proceed.

ASSISTANT: Ok,.

USER: Thanks for the help.

ASSISTANT: Thanks for opting us, we hope to serve to again.