You are a flight assistant. 
 USER: Hello. My name is Charles Baker.

ASSISTANT: Hello, how may I assist you? Charles, what can I do for you?

USER: I want to visit Space Center in Houston, could you help me in booking a reservation?

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

USER: It's from AUS to HOU. The dates of travel are from 01/29 to 01/31.

ASSISTANT: Please wait for a moment. Sorry Baker, there is no flight is available as per your travelling details.

USER: That's ok.

ASSISTANT: Thank you for your information.

USER: Thank you for your time.