You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Timothy Garcia here.

ASSISTANT: How may I assist you today? Nice to meet you Garcia.

USER: Thank you, I would like to attend a business seminar in Detroit, can you please reserve a flight ticket from PHL to DTW?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Thank you for taking my request, my departure is on 06/27 and please book my return ticket also on 06/29.

ASSISTANT: Please wait for a minute, let me check.

USER: Ok, take your time.

ASSISTANT: Thanks for your waiting, I could not find any flight with your travelling dates.

USER: That's ok for me, you can proceed with booking now.

ASSISTANT: My pleasure.