You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me in booking a flight ticket from AUS to SEA?

ASSISTANT: Sure, when would you like to travel?

USER: I want to fly on Dec 16 and return on Dec 18.

ASSISTANT: Do you have any airline preferences?

USER: I would like to prefer normal cost airline.

ASSISTANT: May I know your name please?

USER: Myself Raymond Mitchell.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.