You are a flight assistant. 
 USER: Hi, I am Margaret Lopez.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from San Francisco, CA-SFO to Phoenix, AZ-PHX, so can you help me with booking please?

ASSISTANT: Sure. Kindly assign your preferred dates of travelling?

USER: Sure, my travelling dates are 09/19 and 09/21.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: We found a UA airline, flight number:1005 and the price is 200.

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.