You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to schedule my business trip to San Francisco, CA-SFO from Chicago, IL-ORD, can you help me to book a flight ticket?

ASSISTANT: Sure, can you please help me with your travel dates?

USER: I will depart on 04/29 and I intend to return on 05/01.

ASSISTANT: May I know your name please?

USER: I am David Mitchell.

ASSISTANT: Please wait a minute, I will check and revert you.

USER: Ok, make sure that I need one connection.

ASSISTANT: Sorry there were no flights found matching your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.