You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Christopher Smith this side, I need 1 ticket to travel from PHL to DTW, can you help me?

ASSISTANT: Yes, I will try for best assistance.

USER: Ok.

ASSISTANT: Could you help me with your travel dates?

USER: Search the flights on 03/25 and 03/27.

ASSISTANT: Ok, give me a second.

USER: Please book the ticket if it is having single stop in between source and destination.

ASSISTANT: Sorry to say that there is no flight service provided on this route on your requested dates. Sorry for the inconvenience.

USER: Ok, no issues, its not very urgent to me, I will try after few days.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your support.