You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to travel from LAS to IAD, can you help me in doing that?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My trip dates are Jan 01 to 03.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other specifications in your journey?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Betty Nelson here.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.