You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Raymond Green.

ASSISTANT: How shall I assist you?

USER: I am planning to start a new branch at Denver, help me in booking my flight ticket with one halt.

ASSISTANT: Please provide your journey dates?

USER: My journey dates are from 10/31 to 11/02.

ASSISTANT: Please mention journey codes?

USER: My airport codes are from DTW to DEN. I can pay up to 500 for this trip.

ASSISTANT: No flight is available for your requirement.

USER: Not an issue. Thank you.

ASSISTANT: Thanks.