You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please help me to book a flight ticket from EWR to CLT.

ASSISTANT: May I know your travel dates?

USER: My travel dates are 26 to 28 of July.

ASSISTANT: Do you prefer connection limit?

USER: I am ok with any connection limit.

ASSISTANT: Do you have any other specifications?

USER: I prefer to depart and return in the evening.

ASSISTANT: May I know your good name?

USER: I am Michael Campbell.

ASSISTANT: Sorry, we found no flights on your travel dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.