You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Welcome to flight booking agency.

USER: I am Emma Collins.

ASSISTANT: How can I assist you today?

USER: I want to visit Freedom Trail in Boston, can you book a ticket please?

ASSISTANT: Sure, when would you like to travel?

USER: My travel dates are 06/21 and 06/23.

ASSISTANT: Will you provide your airport codes please?

USER: My airport codes are from EWR to BOS.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no flights found under your details.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, have a great day.