You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Anderson here.

ASSISTANT: How may I help you?

USER: Do you have any flight from CLT to HOU?

ASSISTANT: Ok Barbara Anderson, may I know your travelling dates?

USER: My travelling dates are 01/15 and 01/17.

ASSISTANT: Sorry Barbara Anderson, there is no flight for you with your preferences.

USER: That's fine, thanks for your help and information.

ASSISTANT: Thanks for contacting us.