You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am looking for a flight from ORD to SFO, can you please help me in booking?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: I am planning to start my journey on Apr 29 and return back on May 01.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Betty Green.

ASSISTANT: Sorry, there were no flights with your given details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.