You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight from LGA to IAH.

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

USER: I want to depart on Feb 9 and need to return on Feb 11.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer an business class to travel.

ASSISTANT: May I know your good name?

USER: I am Catherine Walker.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.