You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Young.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from SFO to AUS to meet my uncle, can you help me in booking?

ASSISTANT: Sure, I'll help you in that. May I know your travel dates please?

USER: I am departing on 04/15 and return on 04/17.

ASSISTANT: Young, there are no flights available for you on those dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.