You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Lisa Gonzalez here. I want to change my reservation due to my office work, can you help me?

ASSISTANT: Sure, we are here to help you. Give me a minute.

USER: Ok, I will be waiting for your response.

ASSISTANT: Thanks for your time.

USER: No issues.

ASSISTANT: We didnt found any reservation by this name.

USER: Oh! That's sad to know. Thank you for checking anyways.

ASSISTANT: Thank you for contating us.