You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Richard Miller. I am planning to book a ticket from IAH to CLT. Can you please help me out?

ASSISTANT: Sure, when are you planning to make your trip?

USER: I am planning to travel on Aug 25 and return back on Aug 27.

ASSISTANT: At what time would you like to depart and return?

USER: My return time should be evening.

ASSISTANT: How many connections do you need?

USER: I am looking for a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.