You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Jones.

ASSISTANT: How may I assist you today?

USER: I am looking for a flight from IAH to LAS, to meet my parents who are living in Las Vegas.

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travelling dates are 09/28 and 09/30.

ASSISTANT: I could not find any flight with your travel dates.

USER: It's ok, thanks for your information and service.

ASSISTANT: It's my pleasure.