You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I planned to meet my friend in SFO, can you please help me to book a flight ticket from ORD?

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

USER: I prefer to travel on Mar 11 and Mar 13.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: May I know your name for the booking?

USER: I am Timothy Wright.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: Sorry, no flights are available on your required dates.

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

ASSISTANT: Welcome, thank you for reaching us.