You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to fly from HOU to SFO, can you book a ticket from that root?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My planned travel dates are 12/26 and 12/28.

ASSISTANT: Do you have any other specifications?

USER: I want 1 stopover with in business class only.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: No issues, thank you for the information.

ASSISTANT: Can I know your name for documentation?

USER: Gregory Hill here.

ASSISTANT: Thank you for contacting us.