You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I succour you?

USER: I want to change my existing reservation because there was some delay from my holiday agency in giving my holiday pass. So I want to change my reservation to some other day. Can you help me on this concern?

ASSISTANT: Sure, can you please render the name on which the reservation has been confirmed?

USER: Yes definitely, I had reservated on the name Emily Lopez.

ASSISTANT: Thank you for providing the information. Please wait for a split second to check the active reservation list.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry to inform you that there is no reservation found by the name that you have provided.

USER: Ok no problem, I think there was some problem during my booking. Anyways thank you for your valuable assistance.

ASSISTANT: Ok, Is there anything else I can help you with?

USER: No, I didn't planned any thing. Thank you.

ASSISTANT: Thank you for connecting with us, have a nice day and take care.