You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Assist me in booking a flight ticket from SFO to DEN.

ASSISTANT: I can definitely do that for you. Will you please let me know your maximum connection limit?

USER: Single connection flight is required.

ASSISTANT: On what dates are you planning to make your trip?

USER: I preferred to travel in June 23 and June 25.

ASSISTANT: Which airline will you prefer to travel in?

USER: I prefer to travel in normal cost airline.

ASSISTANT: Do you need an economy class or business class?

USER: Economy class suits best to me.

ASSISTANT: Please forward your name.

USER: This is Samantha Lewis.

ASSISTANT: We found a direct flight on your way. Is that fine?

USER: Sure, proceed to book it.

ASSISTANT: Your booking has been done in flight 1012 of United airlines with an estimate of 200.

USER: Thanks for your booking.

ASSISTANT: Thank you for reaching us.