You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Thomas.

ASSISTANT: What can I do for you today?

USER: I just want to visit PHL to spend my summer vacation there, can you please book me a flight from ORD?

ASSISTANT: Sure, do you need any halt in between the journey?

USER: I need a single halt.

ASSISTANT: Sure, may I know your travelling dates.

USER: Sure, my planned trip dates are May 8th and 10th.

ASSISTANT: Ok, do you have any other requirements?

USER: My depart time must be in the evening.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, sure.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, not an issue. Anyways, thank you.

ASSISTANT: Thank you for reaching us.