You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please help me to book a flight ticket from SFO to LAS.

ASSISTANT: May I know your trip dates to get a flight?

USER: My journey dates are from July, 20 to July, 22.

ASSISTANT: Is there any class concern?

USER: I am happy with any class.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Nicholas Allen.

ASSISTANT: I found a flight-1004 in economy class, shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, booking is done on JetBlue airlines.

USER: Thank you.

ASSISTANT: Thanks for choosing us, have a good day.