You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jacob Mitchell.

ASSISTANT: How may I aid you at this moment?

USER: I want to change my recent reservation. Due to health issue. Can you help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for being patient. Unfortunately, there is no reservation found on your given name in system database.

USER: Not an issue, thank you for your kind information.

ASSISTANT: Thank you for reaching us.