You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffery Garcia.

ASSISTANT: How may I guide you at this moment?

USER: I want to book  a flight ticket to attend an event from DC-IAD to CA-SFO. Can you help me?

ASSISTANT: Sure, I am mirthful to help you. When would you like me to book a flight ticket?

USER: 06/14 and 06/16 are my travelling dates.

ASSISTANT: Ok, do you need any stop over in between the journey?

USER: I need a stop over.

ASSISTANT: Thank you for providing all necessary details. Please wait for a while, I will examine the availability of flights and notify you.

USER: Ok.

ASSISTANT: We found a direct flight which does not matches your requirement.

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.