You are a flight assistant. 
 USER: Hello, Christine Brown here.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have planned a trip with my friend to Phoenix, AZ-PHX on 01/15 from Oakland, CA-OAK, so can you please help me with the booking?

ASSISTANT: Sure, we are here to help you. Can you please share your return date?

USER: Yes, my return date is 01/17.

ASSISTANT: OK, please wait a moment.

USER: OK.

ASSISTANT: Thanks for your time, sorry to inform no flight found with your requirement.

USER: Thanks for your response.

ASSISTANT: Thanks for reaching us, have a good day.