You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Cynthia Mitchell.

ASSISTANT: How may I help you today?

USER: I am planning to visit Houston, will you help me in booking the flight ticket from LGA to HOU?

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

USER: My preferable journey dates are Sept 24 and Sept 26.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: My return time must be in evening.

ASSISTANT: Ok, is there any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you need any other specifications?

USER: No, thank you for asking.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for contacting us.