You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Rachel Phillips here.

ASSISTANT: Rachel, how may I help you?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Ok, not an issue. Thank you for searching.

ASSISTANT: Thank you for contacting us.