You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Gregory Miller. I am planning trip from OAK to EWR for my brother's marriage, can you help me in finding a flight?

ASSISTANT: Sure, please provide me your dates of travelling?

USER: My date of journey is on 08/09 to 08/11.

ASSISTANT: I am sorry because there is no flight found with your provided information.

USER: Thank you very much for  your help.

ASSISTANT: Your welcome, have a nice day.