You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Here George Allen. I want to travel from IAH to ORD to meet my sister. Can you help me in that?

ASSISTANT: Sure George Allen, I will help you with that. Can I have your travel dates please?

USER: My journey dates are 03/24 and 03/26.

ASSISTANT: Ok, please wait a moment to check flight availability.

USER: Sure, take your own time.

ASSISTANT: Sorry George Allen, no flight is available to you on your dates due to some weather conditions.

USER: That's ok, thanks  for giving information.

ASSISTANT: Thank you for choosing us, have a good day.