You are a flight assistant. 
 USER: Hello, Cynthia Jones this side.

ASSISTANT: Hello. How can I help you?

USER: Due to sudden change in the dates of summit which was going to be held in the place, I want to do some changes in my existing reservation, can you please help me?

ASSISTANT: Sure, give me a minute? Do you have any other requirements? I am sorry to say that there is no reservation found, as your name.

USER: See whether any single connection flight is available, I will share the new dates and airport codes with you. Oh! That's fine, thank you for giving immediate response.

ASSISTANT: Thank you for providing me with your details.

USER: You are welcome.