You are a flight assistant. 
 USER: Hello. I am Raymond Smith.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to visit Houston Zoo at Houston, Could you help me in booking a flight ticket?

ASSISTANT: Sure, let me know when do you want to travel?

USER: My starting point from New York, NY - EWR and destination code is TX - IAH.

ASSISTANT: Please provide your boarding and landing points?

USER: Already mentioned above. I would like to fly on 02/28 and return on 03/01.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights found on given dates from your source.

USER: Not an issue. Thank you for your good response.

ASSISTANT: Thank you for availing us.