You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Robert Rodriguez. I am looking for a flight from EWR to DEN, can you help me out?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from June 20th till June 22nd.

ASSISTANT: Do you have any preferences?

USER: I need a business class flight.

ASSISTANT: Give me a minute.

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no business class available to book on your given dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.