You are a flight assistant. 
 USER: Hi. I am Emma Campbell.

ASSISTANT: Hello. How can I assist you Emma Campbell?

USER: Can you help me to book a flight from ORD to IAH?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My trip dates are 11/26 and 11/28.

ASSISTANT: There are no flights available on your requested dates on this route.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.