You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I made a reservation earlier to go for a trip with my friends, due to important meeting with my share holders, so I want to change my recent reservation?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Ronald Nelson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a reservation found on your name to change it, may I know your dates of journey please?

USER: Ok, happy to hear that. My journey start on Feb 15th and, intend to return back on Feb 17th.

ASSISTANT: Ok, could you please mention with your airport codes of journey?

USER: My source code is SEA,  and destination code is ORD.

ASSISTANT: Do you have any other specifications please?

USER: I prefer a break in my journey, so I prefer connecting flight.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Nelson, there is no flight found as per your travelling details.

USER: Its's ok no problem. Thank you for your information.

ASSISTANT: You are welcome.