You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please book me a flight ticket from DFW to BOS?

ASSISTANT: Sure, please share your itinerary dates.

USER: I will start on Aug 26 and return on Aug 28.

ASSISTANT: Which class do you prefer?

USER: I am fine with any class.

ASSISTANT: May I know your connection limit?

USER: I need 1 lay by.

ASSISTANT: May I know your name?

USER: I am Robert Smith.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Robert Smith, no flights are available on your route.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.