You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: I have made an earlier reservation to attend for a meeting, due to some issues meeting has been postponed. Can you please aid me to change my reservation?

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our records.

USER: Sure, please check my reservation on the name of Ruth Baker.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found your reservation. May I know your new airport codes?

USER: Sure, my airport codes are DFW - DEN.

ASSISTANT: Could you please share me your travel dates?

USER: My travelling dates are Oct 4 and 6.

ASSISTANT: Do you have any criteria regrading your journey?

USER: I prefer to travel in normal cost airline.

ASSISTANT: Is there any other specifications?

USER: I need a connected flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you, no flights are found with your criteria.

USER: Ok, thanks for your service.

ASSISTANT: Thank you very much for contacting our agency.