You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me in booking from HOU to SEA, as there is a musical concert in Seattle.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My trip dates are May 20 to May 22.

ASSISTANT: Do you have any class preference?

USER: I prefer a business class.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Patricia Walker.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No issue, thank you for checking.

ASSISTANT: You are welcome.