You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am Michelle Allen.

ASSISTANT: Ok. jj.

USER: I I would like to visit Wet'n'Wild Splash Town at Denver on 04/25. Could you please help me in booking a direct flight?

ASSISTANT: Sure, I am ravish to help you. Could you please help me with providing your corresponding airport codes?

USER: My airport codes are SFO and DEN.

ASSISTANT: May I know when would you like to return?

USER: I would like to return on 04/27.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Sorry to say this, no flights will run on that particular location due to tornado alert.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us, hope to serve you better next time.