You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me to book a ticket from SFO to CLT?

ASSISTANT: May I know on which dates you are willing to travel?

USER: I want to start on Jan 21 and return on Jan 23.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a connecting flight.

ASSISTANT: Do you require any specifications in your journey?

USER: No.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: May I know your name?

USER: Melissa Adams here.

ASSISTANT: Thank you.