You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Baker.

ASSISTANT: How can I assist you today?

USER: I need to book a flight ticket from AUS to DCA, Can you please help me for booking?

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

USER: I would like to travel on 09/27 to return on 09/29.

ASSISTANT: Do you have any limits about flight connection?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other preferences?

USER: I would be return on evening.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Welcome, have a great day.