You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to see Marin Headlands, because it is completely filled with fog. Could you please help me in booking a ticket?

ASSISTANT: Sure, can you provide me your location codes?

USER: My origin airport code is AUS and my destination airport code is SFO.

ASSISTANT: Fine, may I know you travelling dates?

USER: My travelling dates are from 08/18 to 08/20.

ASSISTANT: I have checked with your request, there is no flights with your requirement.

USER: Ok, no problem.

ASSISTANT: Sorry for inconvenience.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us. May I know your name?

USER: My name is Matthew Walker.

ASSISTANT: I need your name for documentation purpose. Thank you.