You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Alexander Lee is here.

ASSISTANT: How can I serve you today?

USER: Being a doctor, I got some important meeting with my head doctors.

ASSISTANT: Ok.

USER: So, I want to change my reservation. Will you help me?

ASSISTANT: Sure, I will help you. Please standby.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Thank you for your service.

ASSISTANT: Thank you for connecting with us.