You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Could you please help me to update my travelling dates in my existing reservation?

ASSISTANT: Sure, we are happy to help you. Please let me know your good name.

USER: I am Kathleen Garcia.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: No issues. Thank you for your information.

ASSISTANT: Thank you for opting us.