You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Young.

ASSISTANT: How may I assist you?

USER: I would like to visit Camel-back mountain at Phoenix, PHX with my friend. Will you help me to book a flight from Detroit, DTW?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 05/26 and 05/28.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford up to 200 only.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1021. Shall I book this ticket?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.