You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Williams.

ASSISTANT: How may I guide you today?

USER: I want to travel from CLT to LAS. Please help me.

ASSISTANT: Can you please share your preferable journey dates?

USER: My trip dates are from 12/01 to 12/03.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's fine, thank you.

ASSISTANT: Thank you for reaching us.