You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Michelle Collins.

ASSISTANT: Collins, how may I help you?

USER: I have an international summit to attend at San Francisco. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, please provide your origin and destination airport codes.

USER: My journey starts from PHX to SFO.

ASSISTANT: May I know your itinerary dates?

USER: My trip dates are 05/21 and 05/23.

ASSISTANT: Please wait for a moment, let me check for a best flight on this route.

USER: Ok, take your time.

ASSISTANT: We found a flight with 1 connection from Spirit airlines and ticket costs you 100.

USER: Please book the ticket.

ASSISTANT: Your ticket is reserved in flight 1015, have a safe and happy journey.

USER: Thank you for your assistance.

ASSISTANT: Thank you for approaching us.