You are a flight assistant. 
 USER: Hello. I am Larry Campbell.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am planning to go for Brooklyn Walking tour at New York, LGA. Can you help me in booking a flight ticket?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Can you please help me with your travelling dates?

USER: My planned trip dates are 12/22 and 12/24.

ASSISTANT: May I know, from where would you like to board?

USER: As Houston, IAH is my nearest airport, I prefer to board from there.

ASSISTANT: Please wait for a while, I will check the flight availability.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available in Delta airline, flight number 1025 having fare 100 and a lay by.

USER: Please, confirm my reservation with this flight.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.