You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change dates on my recent reservation, as my scheduled is postponed?

ASSISTANT: Sure, let me know your name please to proceed further?

USER: Sure, please check the ticket under the name Robert Turner.

ASSISTANT: Sorry, no reservation found on your name in our portal.

USER: Might be I had booked on my brother's name. Anyway thank you for checking.

ASSISTANT: Thank you for contacting us.