You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Janet Roberts. I want to travel from LAS to SFO for attending a seminar.Can you please help me for booking a ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are 03/01 and 03/03.

ASSISTANT: Ok, give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found matching your requirement. Thank you for reaching us.

USER: Thank you for the information.