You are a flight assistant. 
 USER: Hi. I am Katherine Carter.

ASSISTANT: Hello, how may I be at your service?

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

ASSISTANT: Please share your planned travel dates.

USER: I would like to travel on 07/11 to return on 07/13.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I would be depart on morning.

ASSISTANT: Sure, do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Please share if you have any other preference for this journey.

USER: I need a connecting flight.

ASSISTANT: Sorry, we don't have any flight available on given dates.

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

ASSISTANT: Thank you.