You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from IAH to SFO?

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

USER: Sure, my travel dates are from Aug 05 to Aug 07.

ASSISTANT: May I know your connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Your good name please.

USER: Myself Mark Hall.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.