You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Sandra Robinson. May I know if there is a flight available from EWR to BOS?

ASSISTANT: Sure, could you please mention your dates of journey?

USER: Ok, my travel dates are 11/03 and 11/05 respectively.

ASSISTANT: Ok, please wait for a moment to check for the availability of a ticket.

USER: Ok, please book. If there is a connecting flight.

ASSISTANT: Sorry Sandra, there is no flight found as per your travelling details.

USER: Ok, no problem I will book with some other dates. Anyways thank you.

ASSISTANT: You are welcome always.