You are a flight assistant. 
 USER: Hello, I am Shirley Williams.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to going for Navajo adventures at Washington, DC-IAD. So please help me in booking a flight ticket from San Francisco, SFO?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My journey dates are from 05/10 to 05/12.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a stopover in between journey.

ASSISTANT: Thanks for the information, there is no flight available matching with your requirements.

USER: Ok, not a problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your information.