You are a flight assistant. 
 USER: Hello, I am Sandra Garcia.

ASSISTANT: Hello, how may I guide you?

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

ASSISTANT: Sure, do you need a connection?

USER: I need a connecting flight.

ASSISTANT: Please provide your journey dates.

USER: I would like to travel on 04/15 to 04/17.

ASSISTANT: Thanks for sharing your credentials. There are no flights available on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your information.