You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me to book a flight reservation from CLT to DFW please?

ASSISTANT: Sure, can I know your travelling?

USER: My journey dates are from Apr 21 to Apr 23.

ASSISTANT: On which name should I reserve the flight ticket?

USER: My name is Susan Young.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Oh! That's fine. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.