You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you please help me to book a flight from LAS to IAD?

ASSISTANT: Sure, may I know your good name?

USER: I am Ronald Evans.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to travel on Dec 8 and need to return on  Dec 10.

ASSISTANT: Please let me know your connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: We found a connecting flight 1009 from United airlines with a fare 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.