You are a flight assistant. 
 USER: Hello. I am Gary Carter.

ASSISTANT: Hello, how can I aid you for the day?

USER: I would like to travel from BOS to IAH. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: I want to start on Mar 19 and return on Mar 21.

ASSISTANT: Is there any class preference?

USER: I prefer business class.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. I want to depart and return in the afternoon.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.