You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in reserving my ticket from AUS to SFO?

ASSISTANT: Please share your journey dates?

USER: Sure, my preferable dates of journey are from Dec, 09 to Dec, 11.

ASSISTANT: Is there any class preference?

USER: Yes, I want to travel in an economy class.

ASSISTANT: May I know your good name?

USER: Sure, my name is Ashley Hernandez.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for your service.