You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Allen here.

ASSISTANT: How can I assist you?

USER: Please reserve a flight ticket from AUS to OAK for my business meeting.

ASSISTANT: Sure, kindly share your travel dates.

USER: Sure, my departure is on Nov 18 and please book my return ticket also on Nov 20.

ASSISTANT: Please share your class preference.

USER: I don't have any class preference.

ASSISTANT: How much can you afford for this ticket?

USER: I can afford up to 5000 for my journey.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, we found a flight with number 1026 and airline Frontier at a price of 100 with 1 connection. Shall I proceed?

USER: I am ok with this flight, you can proceed with booking now.

ASSISTANT: Sure, your booking is done.

USER: Thank you for your help.

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

USER: Welcome.