You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Richard Thompson. I want to book a ticket from SFO to AUS to attend seminar, can you help me in booking?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I am departing on Nov 24 and return on Nov 26.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

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

ASSISTANT: Thank you for reaching our agency.