You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Nancy Perez. Can you please help me in booking my flight ticket from OAK to IAD?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: Ok, my travelling dates are July 24 and July 26 and I need my return ticket at evening time.

ASSISTANT: Do you need any halt in between your journey?

USER: I need halt in between my journey.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Ok, sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, fine thank you for checking.

ASSISTANT: Thanks for approaching us.