You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Amy Lewis.

ASSISTANT: How may I help you?

USER: I want to book a flight ticket to NV-LAS from IL-ORD. Can you help me?

ASSISTANT: Sure, I am here to help you only. May I know your travel dates please?

USER: 08/02 and 08/04 are my travelling dates.

ASSISTANT: Sorry, we could not provide any flights to that locations due to heavy rainfall alert.

USER: NO issue.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you for your help.