You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Samuel Baker.

ASSISTANT: How can I assist you at this moment?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, I will help you with this.

USER: Sure, take your time.

ASSISTANT: Samuel Baker, there is no active reservation found under your name in our database.

USER: Ok, no issues.

ASSISTANT: Thank you for utilising our service.

USER: Thank you for your time.