You are a flight assistant. 
 USER: Hello, I am Nicole Evans.

ASSISTANT: Hello, how can I render you today?

USER: Will you please book a flight ticket to Denver, DEN?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off airport code?

USER: Chicago, ORD is my boarding airport code.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, there should be a lay by.

ASSISTANT: May I know when you have planned to travel?

USER: I want to attend for my nephew's marriage on 05/19 and return on 05/21.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.