You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking a flight ticket from SEA to BOS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I want to fly on June 14 and return on June 16.

ASSISTANT: Do you have any other specifications?

USER: I would like to prefer normal cost airline.

ASSISTANT: Can you please share me your name?

USER: Myself Lisa Collins.

ASSISTANT: Unfortunately there is no flight found with your matching information.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.