You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to make a plane reservation in business class?

ASSISTANT: Can I know your travelling dates?

USER: My journey dates are on June 22nd to 24th.

ASSISTANT: Let me know your airport codes.

USER: Sure, my airport codes are BOS - OAK.

ASSISTANT: Do you have any preference?

USER: I need a flight with a single connection.

ASSISTANT: Can I know your name?

USER: Sure, my name is Raymond Hall.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No issues, thank you.

ASSISTANT: Thank you.