You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Johnson.

ASSISTANT: How can I help you today?

USER: I am looking for a flight from OAK to IAD, can you reserve me a flight ticket?

ASSISTANT: Sure, I am here to help you in booking. Please share your travel dates also.

USER: My trip dates are from 01/13 till 01/15.

ASSISTANT: Please wait a moment.

USER: I need 1 stop over.

ASSISTANT: Sorry, no direct flights are available on your route.

USER: That's ok, no problem. Thank you for information.

ASSISTANT: Welcome.