You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: George Johnson here. I want to book a flight to attend my friend's son's wedding, can you help me with booking a flight on the route from CLT - OAK?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to travel form 05/28 to 05/30.

ASSISTANT: Give me  a minute. Sorry, there is no flight on your requested dates.

USER: Oh! No issues with it.

ASSISTANT: Thank you for picking us.

USER: Thank you for checking.