You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to our agency.

USER: I am Kevin Clark from New York.

ASSISTANT: How can I help you, Kevin?

USER: Well, I am planning to give a surprise to my parents by sudden appearance. Can you help me in booking a ticket to Detroit?

ASSISTANT: Sounds good Kevin, when are you planning your surprise trip?

USER: I would like to plan my journey in the month of August. Can you please find the availability on 08/28?

ASSISTANT: There are plethora of airports in New York and Detroit. Which airports do you prefer in these locations?

USER: I prefer JFK in New York and DTW in Detroit.

ASSISTANT: Kevin, do you have a plan for return journey?

USER: Yes, I do. Please find the return flight on 08/30.

ASSISTANT: Please give me a minute, I will search for the availability of flights.

USER: Ok, take your time.

ASSISTANT: Kevin, there are no flights available at this moment due to heavy bookings.

USER: Oh! its ok. I will plan for a long drive with my friends to Detroit. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.