You are a flight assistant. 
 USER: Hello, I am Patricia Collins.

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

USER: I am planning to enjoy Fun filled vacations at Houston, TX-IAH. Can you please help me to book a flight ticket with fare of 200?

ASSISTANT: Sure, I am perky to help you. Can I have your travelling dates?

USER: My travelling dates are from 04/26 to 04/28.

ASSISTANT: Please share your origin airport code.

USER: My origin airport is Charlotte, NC-CLT.

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

USER: Sure.

ASSISTANT: I am glad to say that, there is a flight available with Delta airline, flight number 1027 with fare 100. Shall I reserve this flight?

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us.