You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Christopher Perez. Please book me a ticket from AUS to OAK to meet my family.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I have planned to travel on 03/07 and 03/09.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no problem. Thank you.