You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, may I know your name for the change reservation process?

USER: I am Catherine Harris.

ASSISTANT: Your change reservation found, please give me your new airport codes?

USER: My airport codes are from DEN to HOU.

ASSISTANT: May I know your planned travel dates?

USER: My travel dates are May 09 and 11.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: United Airlines providing a flight with the price 100 with single connection. Can I proceed for the booking.

USER: Yes, please.

ASSISTANT: Your ticket reservation done with the flight number 1010.

USER: Thank you for booking.

ASSISTANT: Welcome, thank you for reaching us.