You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know your name?

USER: Sure, my name is Karen Scott.

ASSISTANT: How can I serve you?

USER: I want to go to San Francisco to meet my grand parents, can you book a ticket on 07/18 and 07/20?

ASSISTANT: Sure, I can help you. May I know your travelling airport codes?

USER: Sure, I want to travel from DEN to SFO.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: We found a Frontier airline, flight number:1004 and the price is 200. Can I proceed?

USER: yes, proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for picking us.