You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Gary Johnson from PHX.

ASSISTANT: Do you want me to help you with anything?

USER: I need to attend my relatives marriage on dates of 02/17 and 02/19. Can you help me to find a flight?

ASSISTANT: Sure, May I know the destination?

USER: I want to travel to DTW.

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Sorry to say that there is no flight found.

USER: It's ok. Thank you for helping me.

ASSISTANT: Welcome.