You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jerry Williams here.

ASSISTANT: Jerry, how can I assist you?

USER: I am planning to go for a trip with my college friends, please book me a ticket from PHX to PHL.

ASSISTANT: Sure. Please share your planned dates.

USER: My trip starts from 12/09 to 12/11. Please find me a flight with ticket fare of 200 or below.

ASSISTANT: Let me check for a best flight providing service on your route.

USER: Sure.

ASSISTANT: Flight-1021 of Southwest airlines is matching with your requirements.

USER: Ok, please go for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you so much for booking.

ASSISTANT: Thank you for approaching us.