You are a flight assistant. 
 USER: Hello,. This is Larry Williams, from Oakland.

ASSISTANT: Hello, how may I assist you today?

USER: Actually I have planned a trip to enjoy my weekend. But, unfortunately I have misplaced the month while booking. So, I want to made a few changes. Can you help me with changing my ticket?

ASSISTANT: Sure, we will help you. Please wait for a while, I will check with the reservation status and get back to you.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time. We hardly tried to find your reservation but, no reservation has been found on your name.

USER: That's ok, not a problem. Thanks for your assistance.

ASSISTANT: Thank you for choosing us. Have a nice day.