You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Smith here.

ASSISTANT: Smith, how can I assist you?

USER: I want to travel from DC-IAD on 05/12 for attending a meeting. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, please share your return date.

USER: My return date is 05/14.

ASSISTANT: Can I know your Destination airport code?

USER: My destination airport code is NV-LAS. Make sure my connections limit is 0.

ASSISTANT: The flight 1029 of UA airlines is available on your request. Shall I proceed?

USER: If the flight matches with my connections limit, then proceed for booking the ticket.

ASSISTANT: Yes, your ticket is booked successfully for the flight 1022.

USER: Thank you for helping me.

ASSISTANT: You are welcome.