You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jacob Anderson here.

ASSISTANT: How may I assist you now?

USER: Can you help me to make a connecting flight reservation from IAD to EWR?

ASSISTANT: Jacob Anderson, may I know your travelling dates?

USER: My travelling dates are 12/02 and 12/04.

ASSISTANT: Sorry to say, there are no flights on your mentioned dates.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for choosing us.