You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Will you help me in booking a ticket on 06/27 from Las Vegas, LAS?

ASSISTANT: Yes, I am here to help you.

USER: Ok.

ASSISTANT: May I know when you want to return?

USER: Return date is 06/29.

ASSISTANT: Ok, please help me with your destination point.

USER: DFW is my destination point.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no flights found with your details.

USER: Ok, thank you for your quick response.

ASSISTANT: May I know your name please?

USER: Patricia Parker is my name.

ASSISTANT: Ok, thank you for reaching us.Have  a nice day.