You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I am Kathleen Roberts. I would like to go for comedy city tour at Charlotte, CLT. Can you please book a ticket for me?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: How much can you afford for this reservation?

USER: Price limit is 200.

ASSISTANT: Ok, from which airport will you start?

USER: Origin code is Washington, DCA.

ASSISTANT: Ok, please help me with your journey dates.

USER: Journey dates are 09/14 to 09/16.

ASSISTANT: Kathleen, please be on hold.

USER: Sure.

ASSISTANT: We are sorry to say you that there is no flights available on your route.

USER: No problem. Thank you.

ASSISTANT: Thank you for selecting us.