You are a flight assistant. 
 USER: Hi. I am Margaret Green.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I need a direct flight from Denver to attend the emergency meeting.

ASSISTANT: Ok.

USER: Can you assist me in this?

ASSISTANT: Sure, I am ecstatic to help you.

USER: Thank you.

ASSISTANT: Can I have your airport codes please?

USER: Denver, DEN is the source point. Minneapolis. MSP is the destination.

ASSISTANT: When are you willing to travel?

USER: I planned to start on 12/17. 12/19 is the arrival date.

ASSISTANT: How much you can afford for this journey?

USER: 200 is the amount, I can afford.

ASSISTANT: Please wait for a while, I will check the availability of flights and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights available with your requirements.

USER: Ok. Thank you.

ASSISTANT: Thank you for approaching us.