You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Robert Collins. I want to book a ticket from BOS to EWR, can you help me?

ASSISTANT: Sure, can you share your travel dates please?

USER: My travel dates are 12/15 and 12/17.

ASSISTANT: Do you have any preferences?

USER: I want to travel in business class.

ASSISTANT: Please wait.

USER: I want to depart in the morning.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available in business class.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.