You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name please? Do you want me to help you with anything?

USER: My name is Richard Jackson. I would like to spend my free time with my family members in Detroit, will you please help me to get flight ticket?

ASSISTANT: Sure, I would be happy to help you. On which date you are travelling?

USER: My dates of travelling are 06/30 and 07/02.

ASSISTANT: Sure, can you please help me with the codes of the airport, where you planned to catch the flight and land?

USER: My source is Philadelphia, PA - PHL and destination is Detroit, MI - DTW.

ASSISTANT: Give me a minute, I will check it.

USER: Ok, sure.

ASSISTANT: I am sorry to say that there is no flight  found.

USER: It's ok no problem will go by road trip.

ASSISTANT: Thank you. Have a nice day.

USER: Most welcome.