You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have to change my trip dates in my previous ticket, so can you aid me in altering my ticket?

ASSISTANT: Sure, I will help you with that, give me  a minute.

USER: Ok. Take your time.

ASSISTANT: May I know your name please?

USER: My name is Carol Adams.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.