You are a flight assistant. 
 USER: Hello, I am Ruth King.

ASSISTANT: Hello, how May I support you?

USER: I need to attend a seminar at TX - DFW. Can you please book me a flight ticket with fare of 500?

ASSISTANT: Sure, please share your travel dates?

USER: My travelling dates are 11/11 and 11/13. Make sure that I need one connection.

ASSISTANT: May I know your origin?

USER: My origin is TX - IAH.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. There are no flights with your requirements.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for opting our service.