You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Brooklyn walking tour in New York, EWR. Can you help me to book a connecting flight?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are Apr 19 and 21.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Please reserve the ticket under the name of Frank Gonzalez.

ASSISTANT: Please help me with your source airport code.

USER: My source is from Houston, IAH.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in normal-cost airline.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Can you check with the business class?

ASSISTANT: Sorry, there are no flights found on given details.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.