You are a flight assistant. 
 USER: Hello, myself Jack Carter.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a direct flight from Houston, please help me in booking a ticket from HOU to ORD.

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

USER: My trip dates are 09/12 and 09/14.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Jack, there are no flights available with your preferences.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.