You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need to change the travel dates in the past ticket. can you please help me to do that?

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: Thank you for considering my request. My name is Pamela Adams.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, take your time.

ASSISTANT: There is no previous reservation available under your name.

USER: Oh! I think the ticket is not reserved properly. Anyhow thank you for your valuable time.

ASSISTANT: Thank you for reaching us.