You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket from IAD to HOU?

ASSISTANT: Sure, can you help me with your travelling dates?

USER: My travelling dates are Dec 28 and Dec 30.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Nancy Adams.

ASSISTANT: There is a connecting flight 1019 of Hawaiian airlines, can I proceed?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Welcome.