You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Smith.

ASSISTANT: How can I assist you today?

USER: I want to book a ticket from AUS to OAK to attend seminar, can you help me in booking?

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

USER: I am departing on Dec 24 and return on Dec 26.

ASSISTANT: Do you have any limits about flight connection?

USER: I need a flight with connection limit 1.

ASSISTANT: Do you have any other preferences?

USER: I want to return in evening time.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights found under your preferable details.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome, have a great day.