You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to book a flight ticket from PHL to EWR?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned travel dates are Jan, 4 and Jan, 6.

ASSISTANT: Do you have any limits on number of connections?

USER: I would prefer single connection.

ASSISTANT: Do you have any another specifications on your journey?

USER: I need to return at evening time with normal cost airlines only.

ASSISTANT: May I know your name for the booking?

USER: Betty Lewis here.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: Not an issue, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.