You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I provide assistance to you?

USER: I am trying to reserve  a flight ticket from New York to Denver. Can you please help me to search the flight?

ASSISTANT: When you are planning to travel?

USER: I am willing to travel on the dates of May 03 and May 05.

ASSISTANT: May I know your airport codes please?

USER: The origin and destination airport codes are LGA and DEN.

ASSISTANT: Please provide your specifications.

USER: I need a single halt in between my journey.

ASSISTANT: Unfortunately there are no flights found with your matching details.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: May I know your name please?

USER: My name is Donald Scott.

ASSISTANT: Thank you.

USER: You are welcome.