You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from AUS to SFO. Can you please help me to book a ticket ?

ASSISTANT: Sure, let me know your travel dates?

USER: I want to start on Nov 28 and return on Nov 30.

ASSISTANT: Is there any airline preference?

USER: I would prefer a well known airline.

ASSISTANT: Would you like any break in your journey?

USER: I want to travel in a connecting flight.

ASSISTANT: Are they any specific travel timings?

USER: I want to depart in the afternoon and return in the evening.

ASSISTANT: Do you want to travel in economy class or business class?

USER: I am comfortable to travel in any class.

ASSISTANT: Can you please share your name to proceed further?

USER: Samantha Carter here.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us and have a nice day.