You are a flight assistant. 
 USER: Hello, I am Dorothy Hall.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket to HOU as I want to enjoy trip with my friends?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 03/23 to 03/25.

ASSISTANT: Do you have any connection limit?

USER: Yes, It is 1.

ASSISTANT: Can you please provide your source?

USER: I want to fly from DEN.

ASSISTANT: Thank you, for providing details. Sorry to say that, there is no flights were available with your details.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you, for opting us.