You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you help me to book a flight in business class?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are May 17 and 19.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are BOS and EWR.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Pamela Martin.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.