You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Christopher Harris. I am planning to celebrate Christmas eve with my family members at BOS, can you help me with booking a business class flight?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are Dec 21 and Dec 23.

ASSISTANT: May I know your origin code?

USER: My origin airport code is EWR.

ASSISTANT: Sorry, there were no flights available in your desired routes.

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

ASSISTANT: Thank you for reaching us.