You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from Detroit, MI-DTW to Phoenix, AZ-PHX, for holiday vacation.

ASSISTANT: Sure, may I know your travel dates?

USER: My departure date is 08/12 and will return by 08/14.

ASSISTANT: Do you have any specification?

USER: Price limit 200. Connections limit 1.

ASSISTANT: On which name would you like to reserve this ticket?

USER: I am Patricia Carter.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We could not found any flight on your route.

USER: Thanks for the assistance.

ASSISTANT: Thank you so much.