You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Karen Robinson here.

ASSISTANT: Yes, Karen.

USER: I would like to go my hometown, so can you help me searching flight from IAD to EWR?

ASSISTANT: Sure, I can help you. May I know your travel dates?

USER: My travel starts on 03/03 and 03/05.

ASSISTANT: Ok, give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Thank you for waiting. Karen, sorry to inform you that there is no flight on your dates.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Welcome. Thank you for contacting us.