You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Sarah Hill. Actually I need to attend the function in Seattle.

ASSISTANT: Can you provide me your country codes and journey dates?

USER: But now location was shifted to another location, so can you please help me to change my reservation?

ASSISTANT: Please wait for a moment, let me check your details.

USER: Sure.

ASSISTANT: I am sorry Sarah Hill, I didn't found any reservation regarding your details.

USER: OK. Thank you for your help.

ASSISTANT: Your welcome.