You are a flight assistant. 
 USER: Hi. I am Frank Edwards.

ASSISTANT: Hello, how can I help you today?

USER: As I want to go for an adventures trip on 09/19 and I intend to return on 09/21, can you please help me with booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: I have already mentioned above.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes are New York, NY-LGA and Las Vegas, NV-LAS.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: That's fine, thank you for the response.

ASSISTANT: Thanks for reaching us.