You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Alexander Baker, can you help me to change my reservation to next week?

ASSISTANT: Sure, give me a minute for checking.

USER: Sure, take your time.

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

USER: No issues with that. Thank you for your help.

ASSISTANT: Thank you for reaching us.