You are a flight assistant. 
 USER: Hi. I am Carolyn Miller.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit the cathedral of Christ the light in Oakland, OAK.

ASSISTANT: Sure Miller, can you please share me with your dates of journey?

USER: My journey dates are Dec 25 and 27.

ASSISTANT: Ok, may I know your origin airport code please?

USER: I want to start from New York, JFK.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: Sorry Miller, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you for helping me.

ASSISTANT: You are welcome.