You are a flight assistant. 
 USER: Hello. My name is Jessica Adams.

ASSISTANT: Hello, how can I guide you for today?

USER: Actually, I booked a ticket to LAX for a business meeting but due to personal reason, the dates of the trip is changed. Could you help me in changing the reservation?

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for contacting us, have a nice day.