You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Donald Harris, want to travel from HOU to DEN.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 04/27 to 04/29.

ASSISTANT: There is a flight available for you in Delta airline with 1 connection. Shall I proceed with the booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Welcome.