You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephen Edwards here.

ASSISTANT: Yes Mr. Stephen Edwards, what kind of assistance are you expecting from my end?

USER: I'm planning to visit Houston Zoo in Houston, can you help me in booking the flight ticket in the month of march?

ASSISTANT: Certainly, I am here to help you with the flight booking concerns you have. As I need to enter the details of location in codes, can you provide me the airport codes of your source and destination?

USER: Sure, my travel airport codes are IAH and PHL respectively.

ASSISTANT: Thank you for providing the details, in the same way may I know your preferred travel dates to want to travel on?

USER: Sure, I will start my journey on 03/01 and recur will be on 03/03.

ASSISTANT: Thank you for waiting for me response patiently. Mr. Stephen Edwards I am sorry to say there are no flight available at your location.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for connecting with our agency.