You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you help me in doing a reservation from BOS to IAH?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Sep 18 to 20.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Patrick Wright.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No.

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

USER: Ok, no issues. Than you for the information.

ASSISTANT: Thank you for approaching us.