You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Anthony Moore.

ASSISTANT: How can I assist you?

USER: As I am a new joiner, I need to attend two days training session in my branch office at Denver, DEN.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates on 03/09 and 03/11.

ASSISTANT: Can I know your source airport code?

USER: My source point is Las Vegas, LAS.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation flight on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.