You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I render you today?

USER: Pamela Scott here.

ASSISTANT: Thanks for sharing your name.

USER: I want to change my existing reservation. Could you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: There is no reservation found with your name in our database.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for availing us.