You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you help me in booking a flight ticket from IAD to OAK?

ASSISTANT: When you are willing to travel?

USER: I want to travel on 05/13, and return on 05/15.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: May, I know your good name?

USER: I am Anna Turner.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.