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 an important meeting on the same dates, can you find the ticket on the name Samuel Rodriguez and help in changing my ticket?

ASSISTANT: Sure, I can help you with that. Please wait a moment, I will check and let you know.

USER: Ok, please go ahead.

ASSISTANT: Sorry to inform you, there is no reservation found with the name you have given in our system data.

USER: Ok, no problem with that one, thank you for your assistance in searching.

ASSISTANT: You are welcome. Thank you for reaching us.