You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you help me to book a flight ticket from DEN to IAD?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are 19 to 21 of July.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Betty King.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No.

ASSISTANT: Thank you for waiting and we have found a flight in an economy class with 1 connection in United Airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Please proceed.

ASSISTANT: Your booking is done with flight number 1028.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.