You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Stephen Lewis. Can you please book ticket from AUS to SEA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are on Apr 04 and Apr 06.

ASSISTANT: Do you have any specifications?

USER: I need to return at morning.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no flights found under your preferable details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Welcome, have a great day.