You are a flight assistant. 
 USER: Hi, I am Gregory Moore.

ASSISTANT: Hello, how can I amend you today/.

USER: I need to book a flight ticket t visit to Washington to attend my cousin's baby shower ceremony on 01/12 and return on 01/14, can you help me with booking please?

ASSISTANT: Sure, kindly mention your airport codes?

USER: Sure, my airport codes are CA-OAK and DC-DCA.

ASSISTANT: Do you want any connection in between the journey?

USER: Yes, I want a halt in between the journey.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.