You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am planning to book a ticket from SFO to DEN, can you please book me a ticket?

ASSISTANT: When you are willing to travel?

USER: I am travelling on these dates May 28th and 30th.

ASSISTANT: Do you have any class preference?

USER: I prefer economy class.

ASSISTANT: Let me know your connection limit?

USER: I need a direct flight and I don't have any other preferences.

ASSISTANT: May, I know your good name?

USER: I apologize, I need a single connected flight. Catherine Thomas here.

ASSISTANT: Do you have any other requirement?

USER: I don't have any other requirements.

ASSISTANT: We found 1009 Delta airlines with single connection with price 100, with class economy. Shall I proceed with the booking?

USER: Ok, you can proceed.

ASSISTANT: Your, booking has been confirmed.

USER: Thank you for your services.

ASSISTANT: Thank you for reaching us.