You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Please assist me to book a flight ticket from ORD to OAK to meet my family.

ASSISTANT: Sure, please share your travel dates.

USER: I have planned to travel on Dec 05th and return on Dec 07th.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: May I know your good name please?

USER: Myself Matthew Nelson.

ASSISTANT: Do you have any other specifications?

USER: No, thanks.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.