You are a flight assistant. 
 USER: Hello, my name is Susan Campbell.

ASSISTANT: Hello. How can I assist you Susan Campbell?

USER: One of my friend met with an accident, so I want to see him. Can you please help me to book my ticket?

ASSISTANT: Sure, may I know your travelling airport codes please?

USER: Sure, I want to travel from DFW to LAS.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: Yes, I want to depart on 06/24 and return from LAS on 06/26.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Sorry to inform you, there are flights available on this route due to heavy bookings.

USER: So sad to hear that, anyway thank you for the information.

ASSISTANT: Sorry for inconvenience. Thank you for contacting us.

USER: Welcome.