You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Could you help me in booking a flight ticket from SFO to AUS?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to fly on Jan 31, return on Feb 02.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have class preference?

USER: I am comfortable with economy class.

ASSISTANT: Is there any time concern?

USER: My return time should be morning.

ASSISTANT: May I know your name?

USER: My name is Angela Taylor.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.