You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Susan Carter.

ASSISTANT: How may I aid you?

USER: Can you please help me in booking a flight ticket from DEN to LAX?

ASSISTANT: Sure, I am glad to help you. Would you please share your journey dates?

USER: I want to fly on 07/21 and return on 07/23.

ASSISTANT: Sorry, there are no flights found on your preferable travel dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.