You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you aid me to book my ticket from LAX to EWR?

ASSISTANT: Sure, let me know your travel dates please?

USER: My trip dates are Jul 30 and Aug 1 respectively.

ASSISTANT: May I know your connection limit?

USER: No other preferences.

ASSISTANT: Do you need any other preference?

USER: Make sure that my return should be in the evening.

ASSISTANT: Can I know your name please?

USER: Catherine Thomas here.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.