You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: Please make a reservation with the name of Justin Miller from IAH.

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Mar 23 and Mar 25.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code is LGA.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT:  Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: May I know if you want any specific time for your departure and return.

USER: I want to return in the afternoon.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.