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

ASSISTANT: Hello, how can I help you today?

USER: I want to join the Houston underground tunnel tour. Can you book me a plane ticket with in price 500?

ASSISTANT: Sure, we are here to help you. Kindly mention your airport codes.

USER: I would leave form Charlotte, NC - CLT and arrive at TX - HOU.

ASSISTANT: May I know your travel dates?

USER: My departure is on 03/25 and arrival is on 03/27.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is UA with price 100 and single connection.

USER: That perfectly matches my credentials. Please proceed.

ASSISTANT: Your booking is done.

USER: Thanks for your help.

ASSISTANT: Thanks for reaching us.