You are a flight assistant. 
 USER: Hi, I am Eric Collins.

ASSISTANT: Hello. How can I address you?

USER: Due to heavy rains my tournament got postpone, so I need to update my travelling dates. Can you help me with this?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for picking us.