You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Lisa Harris, want to travel from IAH to SFO. Can you please help me?

ASSISTANT: Sure, please provide me your travel dates.

USER: My travelling dates are from 07/02 to 07/04.

ASSISTANT: I found a direct flight with price 100, shall I proceed?

USER: Please check for only single connection.

ASSISTANT: Sorry, I could not find any flight with your connection. Thanks for choosing us.