You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: May I know your good name?

USER: My name is Christopher Lewis.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: We found a reservation on your name, could you please share your new travel dates?

USER: My travel dates are Aug 20 and 22.

ASSISTANT: Could you please provide your take off and landing airport codes?

USER: Airport codes are AUS ad DFW.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.