You are a flight assistant. 
 USER: Hello, I am Frank Hall.

ASSISTANT: Hello, how may I be your helping hand?

USER: I want to book a direct flight to meet my family friend at Charlotte, NC - CLT. Can you please book a ticket on 08/07?

ASSISTANT: Sure, may I know your return date?

USER: Sure, I want to return on 08/09.

ASSISTANT: From where are you going to travel?

USER: I want to board from Detroit, MI - DTW.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any flights on your travel dates.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for opting us.