You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you  please book a flight ticket from OAK to EWR?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: Thank you. I have planned my travel  dates as July 20 and July 22.

ASSISTANT: Ok, please share me your name.

USER: Sure, myself Jerry Collins.

ASSISTANT: Ok, do you have any connection limit?

USER: I am looking for single connecting flight.

ASSISTANT: Is there any other specifications?

USER: I would like to depart in afternoon time so please make sure that.

ASSISTANT: Sorry, no flights are available on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Welcome, have a nice day.