You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicole White.

ASSISTANT: How can I aid you at this moment.

USER: I want to book a ticket from DEN to OAK to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: I am departing on Jan 26 and return on Jan 28.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with connection limit 1.

ASSISTANT: May I know about your class preference?

USER: I am ok with any class.

ASSISTANT: Do you have any other preferences?

USER: I want to depart in evening.

ASSISTANT: Do you have any airline preference?

USER: I am ok with any airlines.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: UA airlines is providing you the connecting flight, departure time is at 0:00 AM and arrival is at 20:00 PM. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been reserved with flight-1018.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.