You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Myself Emily Nelson. I need you to book a flight ticket from EWR to DEN.

ASSISTANT: Sure, May I know your travelling dates?

USER: October 4 and 6 are my planned travel dates.

ASSISTANT: Do you have any connection limit?

USER:  I need a break in my journey.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I wish to return in the morning.

ASSISTANT: Is there any class preference?

USER: I prefer a business class flight.

ASSISTANT: Thanks for your details, there are no flights found in business class.

USER: That's ok. Thank you.

ASSISTANT: Thank you.