You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight from JFK to OAK?

ASSISTANT: Can you please let me know your preferable travel dates for booking flight ticket?

USER: My travelling dates are Jan 10 and 12.

ASSISTANT: Please let me know if you have any class preference.

USER: I prefer economy class.

ASSISTANT:  To proceed further, can I have your name please?

USER: My name is Donald White.

ASSISTANT:  Are there any more preferences that you want to avail?

USER: I prefer connecting flight.

ASSISTANT: There is a connecting flight-1013 in economy class, is it fine for you?

USER: Please proceed.

ASSISTANT: Ok, booking is done on UA airlines.

USER: Thank you.

ASSISTANT: Welcome, have a safe trip.