You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Thomas Adams, want to travel from PHL to DTW. Please help me in booking my ticket.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my departure will be on 05/05 and my arrival will be on 05/07.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome, have a great day.