You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Sandra Young here. I am planning to celebrate my friend's birthday at SFO. Can you please help me to book a flight from AUS?

ASSISTANT: Sure, please provide me your journey dates to proceed further.

USER: Sure, I want to fly on Sept 25 and intend to return on Sept 27.

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

USER: No, I do not have any preferences in timings.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Thank you for your details, we have a flight from AA airline, flight number 1008 and the price is 100. Shall I proceed with it?

USER: Ok, please proceed.

ASSISTANT: Your seat is reserved in economy class, the flight will depart in the morning and will return in the evening time.

USER: Thank you.

ASSISTANT: Thank you for opting us.