You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Amy Clark.

ASSISTANT: How can I help you?

USER: I would like to change my existing reservation, because my sports events was postponed due to weather conditions.

ASSISTANT: I can help you with it.

USER: Thank you.

ASSISTANT: There is no previous reservation with your details.

USER: Ok, that's fine.

ASSISTANT: Is there any travelling dates?

USER: No, thank you for your services.

ASSISTANT: Thank you for approaching us.