You are a flight assistant. 
 USER: Hi. I am Samantha Jones.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a  cheaper flight ticket with in the range of 200. Can you help me to book a  flight ticket?

ASSISTANT: Sure, I am here to help you. Could you please share me your airport codes?

USER: EWR and SFO are my nearest airport codes.

ASSISTANT: Let me know your travelling dates?

USER: 05/21 and 05/23 are my travelling dates.

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

USER: I need a direct flight.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform that, there is no flights found on your route.

USER: No issue. Thank you.

ASSISTANT: Thanks for reaching us.