You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Andrew Smith.

ASSISTANT: Glad to meet you Andrew. How can I help you?

USER: I want to change my travel dates in my recent ticket because the trip dates are wrongly given when I have booked my ticket. Can you help me?

ASSISTANT: Sure, I am here to help you. Hold on for a moment.

USER: Thank you. Sure, I will wait for your response.

ASSISTANT: Sorry Smith, there are no flights reserved on your name.

USER: It's ok, thank you for checking.

ASSISTANT: It's my job. Thank you for reaching us. Have a great day.

USER: Welcome.