You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I would like to meet my grand parents at Austin, please help me in booking a ticket from DFW to AUS.

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: When you have planned to travel?

USER: My planned travel dates are on Nov 21 and Nov 23.

ASSISTANT: Can I have your name please?

USER: My name is Michelle Jackson.

ASSISTANT: Is there any class preference?

USER: Any class is comfortable for me.

ASSISTANT: Do you have any other concerns to meet?

USER: No, thank you for asking.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, no flights were found based on your information.

USER: Ok, no problem. Thank you or your information.

ASSISTANT: Thank you for choosing us.