You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have to change my flight ticket reservation due to some wrong dates while I was booking, can you help me in changing my flight ticket?

ASSISTANT: Ok, please mention your good name.

USER: My name is Samantha Garcia.

ASSISTANT: Please be hold on for  a moment.

USER: Sure.

ASSISTANT: Sorry Garcia, no reservation found by your name in our website.

USER: Ok, that's fine, thank you for your help.

ASSISTANT: It's my pleasure, have a good day.