You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Parker.

ASSISTANT: Mary Parker. How can I help you?

USER: I would like to attend a music event at Austin, can you help me to book a flight ticket from HOU to AUS?

ASSISTANT: May I know the travel dates?

USER: My preferable journey dates are Sept 03 and Sept 05.

ASSISTANT: Is there any time concern?

USER: I would like to return back in the evening.

ASSISTANT: May I know the airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: Is there any connection limit.

USER: I prefer connecting flight.

ASSISTANT: Are there any other preferences?

USER: No, thanks for asking.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform that there are no flights on your route for your preferable dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.