You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Hernandez here.

ASSISTANT: How may I assist you today?

USER: I want a direct flight for my journey from OAK to BOS, can you help me please?

ASSISTANT: Sure, please provide me your travel dates.

USER: I will be travelling from 07/09 to 07/11.

ASSISTANT: Please wait for a minute.

USER: Ok, please check for a direct flight within the price of 5000.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: Oh! That's sad to know, thank you for checking.

ASSISTANT: Welcome.