You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Please help me out in booking flight ticket from LAS to HOU.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Sept 16 and Sept 18.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the afternoon and return in the evening.

ASSISTANT: May I know your name?

USER:  My name is Nancy Campbell.

ASSISTANT: Ok, please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for contacting us.