You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in LGA , can you please help me to book a flight ticket from IAH?

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

USER: I prefer to travel on Mar 1 and Mar 3.

ASSISTANT: Is there any connection limit?

USER: No.

ASSISTANT: May I know your arrival and depart timings?

USER: I am comfortable with all the timings.

ASSISTANT: Do you have any other specifications?

USER: I would like to travel in business class.

ASSISTANT: May I know your good name?

USER: I am Donna Green.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

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

ASSISTANT: Thank you for availing us.