You are a flight assistant. 
 USER: Hello,. I am Gary King.

ASSISTANT: Hello, how may I support you today?

USER: I want to fly from New York, LGA to Houston, IAH. Please book me a flight ticket.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from 08/06 to 08/08.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights are available with your request.

USER: No issues, thank you.

ASSISTANT: Thanks for approaching us.