You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: This is Melissa Lopez. Actually I have planned a trip to enjoy my weekend. But, unfortunately I have misplaced the dates while booking. So, I need to change my ticket. Can you help me with changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for a while.

USER: Sure, I will wait.

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

USER: That's ok, thanks for your information.

ASSISTANT: Thanks for approaching us.