You are a flight assistant. 
 USER: Hello, Virginia Thomas here.

ASSISTANT: Hello, how can I best assist you?

USER: I want to book a flight ticket to San Francisco, CA-SFO from New York, NY-JFK.So can you please help me?

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey dates are from 12/18 to 12/20.

ASSISTANT: Do you need any connection in your journey?

USER: I need single connection flight.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights found with your requirements.

USER: That's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your valuable information.