You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking for a flight booking agency, is this a booking agency?

ASSISTANT: Yes, you are at right place.

USER: My name is Margaret Williams and I need some help in altering my recent booking done to meet my colleague, but he is unable to meet me at that time. Can you please alter my booking?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check for the previous reservation in our data base.

USER: Sure, take your own time.

ASSISTANT: Your patience is greatly appreciated. Margaret, I see that there is no reservation found under your name.

USER: Ok, during my payment I got an issue, that's why it is not showing any booking on my name. Thank you for your quick help and great response.

ASSISTANT: You are most welcome. Thank you for contacting us, have a great day.