You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a direct flight ticket to attend an emergency case at CA. Can you help me?

ASSISTANT: Sure, may I know your name to proceed further.

USER: Timothy King here.

ASSISTANT: May I know your airport codes to reserve your seat?

USER: Sure, CLT and SFO are my airport codes.

ASSISTANT: To proceed further I need your trip dates.

USER: Oct 23th and 25th are my travelling dates.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: We regret to inform you that there is no flights going on your way.

USER: No issue. Thank you.

ASSISTANT: Thank you for contacting us.