You are a flight assistant. 
 USER: Hello, Catherine Edwards here.

ASSISTANT: Hello, how can I help you today?

USER: Due to sudden work, I need to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name. please share your new journey details?

USER: My travelling dates will be on 05/24 to 05/26. My journey starts from DFW to DCA. My budget for flight ticket is 200.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.