You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Barbara Collins here.

ASSISTANT: How may I assist you?

USER: I am looking for a flight with price below 500. Can you book it?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates for journey are 02/10 to 02/12.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes for boarding the flight are PHL to DFW.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1018. Shall I book this ticket?

USER: Sure.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you so much.