You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from IAH to MSP, Can you please help me for booking?

ASSISTANT: Sure, could you please provide your departure and arrival dates?

USER: I would like to travel on 12/22 to return on 12/24.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications to be met?

USER: I would be return on morning.

ASSISTANT: Kindly mention your name to proceed further?

USER: Christopher Adams here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.