You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Thompson.

ASSISTANT: How may I assist you at this moment?

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

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: I am departing on 27 Oct and return on 29 Oct.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with connection limit 1.

ASSISTANT: Do you have any particular timings in your departure and arrival?

USER: I want to return in morning time.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Please be on hold to check the flights on your route.

USER: Sure, take your time.

ASSISTANT: We regret to tell you that, there are no flights available for your journey with your required preferences.

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

ASSISTANT: Thank you for reaching us, have a great day.