You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, can you please provide your name to check your reservation details in our database?

USER: Can you please change the reservation, under the name Dorothy Hernandez.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure, I will wait for your kind response.

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

USER: Not a big deal, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for opting us.