You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to change my existing reservation due to my exams got postponed. Can you check the status?

ASSISTANT: Sure, can you give me your name?

USER: Sure, Jeffrey Martinez here.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No issues, thank you for reaching us.

ASSISTANT: Thank you for reaching us.