You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Eric Lewis here.

ASSISTANT: Eric Lewis, how can I assist you at this moment?

USER: I heard that your agency is giving best services in booking, will you provide changing reservation service also?

ASSISTANT: Yes, we do provide the changing of reservation service.

USER: Actually, I have booked a ticket on last week with wrong details. I need your help in modifying that reservation with correct details, can you please help me with that?

ASSISTANT: Sure, I am here to help you with this issue. Can you please give me a moment to check your reservation status in our database?

USER: Sure, you please carry on. I will be online.

ASSISTANT: Thanks for being on hold, I have checked the database with your name Eric Lewis and I couldn't find any active reservation with your name to modify it.

USER: Oh! May be something went wrong while I was booking the ticket. I'll recheck it once and get back to you later. Thank you so much for your service anyways.

ASSISTANT: Thank you for contacting us, hope you had a best experience with us.