You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Debra Lopez.

ASSISTANT: How can I assist you, Debra?

USER: I would like to attend a music concert at Austin, please help me in booking a ticket from SFO to AUS.

ASSISTANT: May I know your preferred trip dates for better search?

USER: My trip dates are 06/12 and 06/14.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment, Debra.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.