You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Karen Martinez. I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, we will surely help you.

USER: Thank you.

ASSISTANT: Please give me a moment to check your details in our database and I will revert to you with the status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that there is no active reservation found on the name Karen Martinez to do modification.

USER: Oh! It may not be booked properly due to some technical issues. Anyway, thank you for your time.

ASSISTANT: Than you for contacting us.